Forum zhromadźenstwa Thunderbird

Received messages show as tabs - rather than listings and are often repeated .. This only happens in Windows version not in Android (which perforems and displays perfectly - see attached upploaded image.

I looked it all up:

Incoming (IMAP) outlook.office365.com 993 SSL/TLS OAuth2

Outgoing (SMTP) smtp-mail.outlook.com 587 STARTTLS OAuth2

Use IMAP not POP

Use OAuth2 not password

Username is my msn email address (username@msn.com)

I have spent all evening and all night trying to set this up and it has failed every single time. I used AI to double check all the info setting. I found nothing on Mozilla or Mozilla Thunderbird to help.

It should work and it is not working. There is no other information I have found that would contribute to solving the problem.

Hello, I'm currently having a problem with Thunderbird version 15.9. I can no longer sign in to my Google-Account after I set new passwords and entered them in Thunderbird. Several attempts were unsuccessful. I then deleted all entries related to my Google account. Adding the existing account again failed. I received two error messages. Error message 1: “Waiting for authorization during sign-in". Error message 2: “The inbox server is already in use.” An other E-Mail Account runs perfect. I urgently need help.

I have tried to fix 1 of 4 Thunderbird email accounts not receiving or sending emails. Been lagging for a few days although other 3 accounts working fine. Followed a YouTube, checked settings, firewalls, virus settings etc. Then on 'Inbox' selected 'New' then 'Properties' then 'Ok' and all my inbox and deleted emails have disappeared! Please help!

For some time Thunderbird has not been displaying email I finally got an error message:

"This message requires formatting features that your email client does not support. To read today's newsletter, use this link: <>"

Nothing was in the suggested "use this link"

What formatting feature am I missing? How did I lose it? I can I discover it and include it again? Is this a Firefox problem or my Windows 11 problem?

I did remover Firefox and then reinstalled it but that didn't change anything. -- Robert Kastigar 5101 N Central Park Ave Chicago IL 60625 773 588 9634 Kastigar@gmail.com

I have just set up a Thunderbird account and linked it to my Google business account which I am going to cancel and close.

can I still view old emails (for the google account I am going to close) in Thunderbird after my google business account has been cancelled

I can't add my personal @hotmail.com account to Thunderbird. Every attempt ends with "Authentication error – Unable to log in at server. Probably wrong configuration, username or password." All my other accounts (Gmail and several Microsoft 365 business accounts using outlook.office365.com + OAuth2) work fine in the same profile.

Setup

• Thunderbird 160.0 (64-bit) on Windows (problem also happened on 159.0)
• Settings auto-detected by the Account Hub: IMAP outlook.office365.com:993 SSL/TLS OAuth2; SMTP smtp-mail.outlook.com:587 STARTTLS OAuth2
• POP3 (outlook.office365.com:995 SSL/TLS OAuth2) fails in exactly the same way

What happens

• The Microsoft sign-in opens in my default browser, I sign in with the correct account (2FA), and I get the "You're all set" page.
• With mailnews.oauth.loglevel = All, the Error Console shows a successful token response from login.microsoftonline.com with scopes IMAP.AccessAsUser.All, POP.AccessAsUser.All and SMTP.Send, and "Creating new login for ...@hotmail.com". Microsoft also emails me "New app(s) connected to your account".
• Immediately after that, account setup fails with "Unable to log in at server". The console shows nothing more specific.

What I already tried

• Removed and re-added the account several times; cleared the saved OAuth logins for this address
• Cookies are allowed; mailnews.oauth.useExternalBrowser is back to true (setting it to false made the redirect go to https://127.0.0.1 and fail)
• In Outlook.com: IMAP is enabled (toggled off/on and saved). The address is the primary alias of the Microsoft account. Two-step verification is on. Recent activity shows no blocked or unusual sign-ins, even right after a failed attempt.
• Webmail works normally.
• Microsoft support says nothing is blocked on their side and sent me here.

Is there anything else I can check, or a way to see the actual IMAP server response to find out why it rejects the token?

Today, November 12 2026 I lost all access to Microsoft email accounts (through TB) and calendars (through TbSync). Nothing, neither business or personal email accounts, will send or receive email as of this moment. I have checked behavior of software in troubleshoot mode and nothing changes. I have not located an error log in TB. My only indication of a problem is that the windows error console alerts an error "server graph.microsoft.com responded with an error" No other information. It would be nice if the error logs were easily available in TB.

Is there a general conflict between MS graph server and TB??

Hello, I am having trouble syncing my calendar and address book between my phone (Samsung S23) and Thunderbird on my computer. It seems that the 'My Phone Explorer' add-on does not support the latest version of Thunderbird (version 160). Please help me. Best regards, Leif Abrahamson leab9@yahoo.se

It was working fine on the new computer until yesterday. Now I get a pop-up box that says: ' Unable to connect The connection was refused when attempting to contact localhost.

The site could be temporarily unavailable or too busy. Try again in a few moments.

If you are unable to load any pages, check your computer's network connection. If your computer or network is protected by a firewall or proxy, make sure Thunderbird is permitted to access the web.

My Thunderbird email is not updating the inbox and it is not delivering any confirmation emails. This makes the account unusable. I have search AI for an hour and none of the instructions provided work; most do not even refer to my account.

I have Thunderbird portable as my em ail desktop client and AOL mail as my email. If I change to sign into AOL with a passkey will I have to change my settings in the Thunderbird desktop?

thank you

When I try to add a new person's email address to my Thunderbird address book, the left 2/3 of the page is grayed out and the right side doesn't fit the space. I can find no way to save, and the usual ways to reduce page size don't seem to work.

Thunderbird issues I have Windows 11 and Thunderbird updated to 160 Started afternoon Nov. 10 Suddenly could not receive emails in my Thunderbird email program. I have windows 11 version 160 of thunderbird. Could send messages ok. Message when I try to download is: The certificate for pop.xplornet.com:995 does not come from a trusted source. Which can be seen in account settings SSL/TSL in thunderbird The server settings have not been changed –I checked with Xplore (my server -I am on a satellite) this morning and they have changed nothing. I tried my old computer with windows 10 and the same thing happened, but on my husbands computer (also windows 10), Thunderbird would receive messages. So it may not be a Windows 11 issue. It could be a Thunderbird update issue as talked about below from help line. Can see update history in Thunderbird Settings -General-thunderbird updates The latest update version 160 was done on Nov 11 at 9pm The 159 was done on Oct 30 Going to help site several suggestions that I am not comfortable trying: Verify that your incoming email is not being blocked by your firewall, VPN, proxy, antivirus software (which sometimes implements a proxy and intercepts email) or your Internet Service Provider: • Try briefly turning off antivirus, VPN, proxy and firewall software, check for new email, and turning them on and check again for email.

Note: Software blocking incoming email is a common cause of not being able to receive messages after updating Thunderbird, since it may be set to trust the previous version of Thunderbird but no longer recognize the updated version as trusted. When this happens, IMAP folders may also disappear. here documents some basic information about antivirus products and their known bad interactions with Thunderbird. • Remove Thunderbird from your program's list of trusted or recognized programs, then add it back manually or when prompted to resolve this.

Troubleshoot Mode Thunderbird Troubleshoot Mode Thunderbird > Start Thunderbird in Troubleshoot Mode Switch to Troubleshoot Mode: If Thunderbird is not running: If Thunderbird is already running: Click ≡ > Help > Troubleshoot Mode... and in the Restart in Troubleshoot Mode prompt, choose Restart. In the Thunderbird Troubleshoot Mode dialog box, click Continue in Troubleshoot Mode button. If you want Troubleshoot Mode changes to be temporary, do not check the checkboxes - temporary is the default.

Is anyone else having this issue?

I have had to change my BT email password because of a phishing email I foolishly clicked on. Now I can't access any of my new emails on Thunderbird. How do I update my Thunderbird password to be the same as my BT one please?

I'm running Thunderbird v. 153.6.0esr (64-bit) on my notebook computer desktop. Yesterday I attempted to re-add an e-mail account to Thunderbird after deleting it to update the settings for that account so that they'd properly align with my ISP's server settings for the account. This originally came about after I changed the account password a couple of times, and found myself unable to send e-mail from Thunderbird. I was, and still am, able to send e-mail from the ISP's webmail app, however.

I installed the update to the Program files folder, which was the default location. Immediately after upgrading, I noticed that the deleted user e-mail account was restored in Thunderbird. The account settings, including server settings, appeared to be correct. Upon closer inspection, I also noticed that the most recent e-mails saved in the inbox and in folders for the two accounts with the same domain name dated back to last year or earlier, even though I received many e-mails addressed to those accounts in Thunderbird since then I can't explain why that happened. Something else rather strange happened: Both the former Thunderbird installation v. 153.6.0esr (64-bit) and the new, upgraded installation v. 160.0 (64-bit) now appear on my Windows taskbar. The first couple of times I did the upgrade to v. 160.0 (64-bit), that version's icon vanished after a few minutes and I was left with the previous v. 153.6.0esr (64-bit). Today, however, I launched Thunderbird from the upgraded Thunderbird.exe app found in the Program folder, which accounts for why the upgraded app's icon still appears on the taskbar. Yet I can still run the previous version just as I could before the upgrade, albeit without the previously deleted user account I sought to restore.

Although what I described may sound like a blessing as I have my choice of versions to choose from right on the taskbar, Moreover, two related Thunderbird apps were restored as well following the upgrade: Lightning and my Address book, although with the same date limitations mentioned above concerning the e-mail files. This very much concerns me, especially because the e-mail files in the upgraded version appear to be outdated by, at first glance, four months to > 1 year. I'm also concerned because I thought the upgrade process would be automatic. This upgrade, however, was anything BUT automatic.

I find myself getting busier with work these days, and as we're nearing the holiday season. I simply don't have time to troubleshoot this now. I can use Thunderbird on my mobile phone without a problem. I don't wish to use it on the ISP's webmail app as it would simply be too inconvenient in the long run. Please help if you can, at least by offering or providing an explanation of why the above anomalies happened. Also note that I have a recent full image backup of my hard disk. I'll be glad to make screenshot images of this latest configuration available to you upon request.

I have one more, but related, request. If you know of a way I can restore the deleted user account I referred to above to my previous version of Thunderbird, 153.6.0esr (64-bit), let me know what that is and I'll gladly delete the new v. 160 I upgraded to. I'd like to be able to upgrade to that version smoothly and without the inconsistencies I encountered with this upgrade, but I recognize the need to do it without losing at least a year's worth of e-mail data, as described above.